Patents by Inventor Frank E. Steele

Frank E. Steele has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Lift truck drive train
    Patent number: 6604601
    Abstract: A lift truck having a parallel pair of drive trains, each powering a drive wheel on a different side of the lift truck. Each drive train includes a DC electric motor driving a variable displacement, hydraulic pump having a pressure output capacity of at least 3,000 psi. Each hydraulic pump is connected to a hydraulic motor, having a rotational speed capacity of at least 3,000 rpm and is connected through a transmission to the drive wheel on a different side of the lift truck. The DC motor is run continuously at full rpm and the torque/speed ratio of the drive train is controlled by controlling the displacement of the hydraulic pump.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: August 12, 2003
    Assignee: Biomet-Ross, Inc.
    Inventor: Frank E. Steele
  • Lift truck drive train
    Publication number: 20030075376
    Abstract: A lift truck having a parallel pair of drive trains, each powering a drive wheel on a different side of the lift truck. Each drive train includes a DC electric motor driving a variable displacement, hydraulic pump having a pressure output capacity of at least 3,000 psi. Each hydraulic pump is connected to a hydraulic motor, having a rotational speed capacity of at least 3,000 rpm and is connected through a transmission to the drive wheel on a different side of the lift truck. The DC motor is run continuously at full rpm and the torque/speed ratio of the drive train is controlled by controlling the displacement of the hydraulic pump.
    Type: Application
    Filed: October 22, 2001
    Publication date: April 24, 2003
    Inventor: Frank E. Steele